Decomposition of 14C-labelled Lignin Holocellusose and Lignocellulose by Mycorrhizal Fungi

1984

28 Lit. Ang.

Unselbständiges Werk

12164

200102160

Five different species of known ecto-mycorrhizal fungi: Cenococcum geophilum, Amanita muscaria, Tricholoma aurantium. Rhizopogon roseolus were studied for their ability to metabolize the major components of plant cell walls. All stains were able to decompose 14C-labelled plant lignin, 14C- lignocellulose and 14C-DHP-lignin at a rate which was lower than the one observed for the known white rot fungi Heterobasidion annosum and Sporotrichum pulverulentum. Also 14C-(U)-holocellulose was relatively less degradable for the mycorrhizal fungi than for the white rotters. On th other hand, aromatic monomers like 14C-vanillic acid were decomposed to a much higher extent by two species of mycorrhizal fungi compared to the activity observed for Heterobasidion annosum. The results of the experiments reveal that these stains of mycorrhizal fungi are well able to utilize the major components of plant material and thus can contribute to litter decomposition in the forest floor.